| 主权项 |
1. A phase shifting device, comprising:
an input operable to receive an input signal to be adjusted; a hybrid coupler coupling the input with an output; and at least one reflective load comprising a lumped equivalent impedance transformer circuit also coupled with the hybrid coupler to receive the input signal, the lumped equivalent impedance transformer circuit having liquid crystal variable capacitors operable to adjust the input signal in response to a bias voltage applied thereto and to provide the adjusted input signal to the hybrid coupler as an output signal; wherein the lumped equivalent impedance transformer circuit comprises a half wavelength lumped equivalent impedance transformer circuit comprising a pair of inductors in series coupled, at ends thereof, with first, second and third liquid crystal variable capacitors operable to present both a variable impedance and a variable effective electrical length to the hybrid coupler in response to the bias voltage to provide an adjusted phase input signal as the output signal, and wherein the lumped equivalent impedance transformer circuit comprises at least a pair of the half wavelength lumped equivalent impedance transformer circuits coupled by a quarter wave impedance transformer. |
